Increased H-reflex response induced by intramuscular electrical stimulation of latent myofascial trigger points
Increased H-reflex response induced by intramuscular electrical stimulation of latent myofascial trigger points
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DOI：
10.1136/aim.2009.001099
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发表时间：
2009-12-01
影响因子：
2.5
通讯作者：
Arendt-Nielsen, Lars
中科院分区：
文献类型：
--
作者：
Ge, Hong-You;Serrao, Mariano;Arendt-Nielsen, Lars
背景：肌筋膜触发点（MTrP）表现为机械性痛觉过敏和异常性疼痛。没有电生理学证据表明肌筋膜触发点 MTrP 处肌梭传入神经的兴奋性。本研究的目的是探讨肌内电刺激是否可以引发 H 反射反应。如果是这样，则评估 MTrPs 反射反应增加的可能性。方法：首先通过对 13 名健康受试者的胫神经进行电刺激来确定 H 反射潜伏期和传导速度。然后将肌内单极针电极随机插入腓肠肌中的潜在 MTrP 或非 MTrP。通过肌内记录电极向MTrP或非MTrP传递不同强度的电刺激。结果：胫神经电刺激的平均传导速度（44.3+/-1.5m/s）与肌内电刺激的传导速度（43.9+/-1.4m/s）相似（p>0.05）。 MTrP 处的肌内 H 反射幅度高于非 MTrP 处 (p
Background: Myofascial trigger points (MTrPs) present with mechanical hyperalgesia and allodynia. No electrophysiological evidence exists as to the excitability of muscle spindle afferents at myofascial trigger points MTrPs. The purpose of this current study was to explore whether an H-reflex response could be elicited from intramuscular electrical stimulation. If so, to assess the possibility of increased reflex response at MTrPs.Methods: The H-reflex latency and the conduction velocity were first determined from electrical stimulation of the tibial nerve in 13 healthy subjects. Then an intramuscular monopolar needle electrode was inserted randomly into a latent MTrP or a non-MTrP in the gastrocnemius muscle. Electrical stimuli at different intensities were delivered via the intramuscular recording electrode to the MTrP or non-MTrP.Results: The average conduction velocity (44.3 +/- 1.5 m/s) of the electrical stimulation of tibial nerve was similar (p>0.05) with the conduction velocity (43.9 +/- 1.4 m/s) of intramuscular electrical stimulation. The intramuscular H-reflex at MTrPs was higher in amplitude than non-MTrPs (p